What is a rounds cook?

"Rounds cook" is not a standard culinary term. It's possible that it's:

* A regional term: There might be a specific region or cuisine where this term is used, perhaps referring to a particular type of cook or their duties.

* A specialized term: It could be used within a specific industry or restaurant setting, referring to a cook responsible for a particular set of tasks or dishes.

* A misspelling: It might be a typo of another culinary term, like "roundsman" which refers to someone who prepares ingredients or dishes for other chefs.

To understand what "rounds cook" means, you need more context:

* Where did you hear this term? Was it a restaurant menu, a cooking show, or a conversation with someone?

* What was the context? What were they talking about when they used this term?

Providing more information will help clarify the meaning.